Initiation of subduction zones: implications for arc evolution and ophiolite development

Karig, Daniel E.

doi:10.1144/gsl.sp.1982.010.01.37

Cited by 60 publications

(35 citation statements)

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“…Studies on subduction initiation have been many and continue to this day (e.g., McKenzie 1977;Karig 1982;Mueller & Phillips 1991;Toth & Gurnis 1998;Niu et al 2003;Stern 2004;Gurnis et al 2004;Stern et al 2012;Shervais & Choi 2012;Marques et al 2014). With all factors considered, the hypothesis of "subduction initiation as a consequence of lateral compositional buoyancy contrast within the lithosphere" (Niu et al 2003) is physically straightforward, geologically consistent with observations, and is capable of making testable predictions.…”

Section: The Origin Of Subduction Zonesmentioning

confidence: 90%

Geological understanding of plate tectonics: Basic concepts, illustrations, examples and new perspectives

Niu¹

2018

gtm

120

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Publisher's copyright statement:This article is available under CC-BY-NC Creative Commons Attribution Non-Commercial Licence, which permits users to use, reproduce, disseminate or display the article provided that the author is attributed as the original creator and that the reuse is restricted to non-commercial purposes i.e. research or educational use. Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. With 16 figuresAbstract: In this paper, I have reviewed some basic concepts of the plate tectonics theory in a plain geological language with the aim of encouraging geologists to correctly understand this theory in its applications to geological problems. I emphasized the decisive role of subduction as the ultimate (dominant) driving force of all the plate tectonics phenomena. Hence, my discussion has focused on major issues such as the origin of subduction zones, slab rollback, trench retreat, trench suction and driving mechanism of plate motion (both oceanic and continental) by means of illustration with hypothetical and real examples. As much of the discussion is heavily based on my personal (original) perspectives, some of the concepts, interpretations and hypotheses may not be familiar to many and may not be readily found in the existing literature. Mantle plume hypothesis is not the focus of this paper and is thus only mentioned in passing.

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Section: The Origin Of Subduction Zonesmentioning

confidence: 90%

Geological understanding of plate tectonics: Basic concepts, illustrations, examples and new perspectives

Niu¹

2018

gtm

120

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“…in the last c. 20 myr, but they generally receive little or no attention. Karig (1982) provided one of the few accounts that discussed the initiation of subduction in some of them. None of the subduction zones initiated at active spreading centres or at transforms.…”

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confidence: 99%

The subduction initiation stage of the Wilson cycle

Hall

2018

131

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In the Wilson cycle, there is a change from an opening to a closing ocean when subduction begins. Subduction initiation is commonly identified as a major problem in plate tectonics and is said to be nowhere observable, yet there are many young subduction zones at the west Pacific margins and in eastern Indonesia. Few studies have considered these examples. Banda subduction developed by the eastwards propagation of the Java trench into an oceanic embayment by tearing along a former ocean-continent boundary. The earlier subducted slab provided the driving force to drag down unsubducted oceanic lithosphere. Although this process may be common, it does not account for young subduction zones near Sulawesi at different stages of development. Subduction began there at the edges of ocean basins, not at former spreading centres or transforms. It initiated at a point where there were major differences in elevation between the ocean floor and the adjacent hot, weak and thickened arc/continental crust. The age of the ocean crust appears to be unimportant. A close relationship with extension is marked by the dramatic elevation of land, the exhumation of deep crust and the spectacular subsidence of basins, raising questions about the time required to move from no subduction to active subduction, and how initiation can be identified in the geological record.

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“…5, had the pole shifted toward the right, rather than to the left, obliquely consuming subduction zones would have formed along the former transform faults. This seems a common process (Dewey, 1975;Karig, 1982;Casey and Dewey, 1984, esp. Fig.…”

Section: Transform Faults As Large-scale Geological Structuresmentioning

confidence: 99%

Transform Fault

Şengör¹

2014

Encyclopedia of Marine Geosciences

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Initiation of subduction zones: implications for arc evolution and ophiolite development

Abstract: The initial location of trenches with respect to continental margins is a at

Cited by 60 publications

References 62 publications

Geological understanding of plate tectonics: Basic concepts, illustrations, examples and new perspectives

Geological understanding of plate tectonics: Basic concepts, illustrations, examples and new perspectives

The subduction initiation stage of the Wilson cycle

Transform Fault

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